Hoymiles’ latest HiOne BESS features an inverter that is equipped with 4 independent 20 A MPPT channels
This solution supports retrofitting of battery banks according to the prosumer’s evolving demands over different stages of plant lifecycles
According to the company, each inverter supports up to 8 battery packs, increasing the total capacity to up to 64 kWh
Hoymiles Power Electronics Inc., a well-known provider of module-level power electronics (MLPE) and energy storage solutions (ESS), unveiled its HiOne battery energy storage solution (BESS) at an in-house event.
At the event, Petar Varga, the company’s Senior Sales Manager in Europe, elaborated on the product that is aimed at addressing the growing demand for residential solar-plus-storage solutions in Europe.
This solution vertically mounts battery banks, a hybrid inverter, and an energy management system (EMS) on a platform, saving space and giving the system a slim, pleasing appearance. The inverter is equipped with 4 separate MPPT channels, each with a 20 A (DC) capacity. This distributed configuration provides installation flexibility (PV strings) by using different parts of shadow-free roof spaces with varying slopes, dedicated to individual channels, compared to a centralized MPPT design, which is prone to current mismatch. On the storage front, the BESS comprises 8 kWh battery packs, each with up to 314 Ah battery cells and a lifespan of more than 8,000 cycles (charging/discharging). According to Varga, each battery cell’s state of charge (SoC) is monitored in real time, while the built-in DC-DC converter maintains the inverter DC busbar voltage within an allowable range. This feature enables retrofitting batteries with existing ones at different stages of the plant lifecycle for capacity expansion. Regarding expansion, each inverter is designed to support up to 8 battery packs, bringing the total storage capacity up to 64 kWh.
On the operational side, its battery banks are charged from excess solar generation or the distributed grid when tariffs are low during the day, and subsequently discharged during short windows of high tariffs in real time. Varga says that this Time-of-Use (TOU) functionality is blended into the system with a built-in AI algorithm. This ‘AI-TOU’ learns tariff rate patterns, prosumer consumption habits, and forecasts solar generation over a period, enabling automatic scheduling (charging/discharging) across 8 different time slots. In addition to maximizing self-consumption and cost optimization, this BESS switches to backup mode within no time (0 ms) of grid failure or shutdown, ensuring continuous operations of household loads, even inductive ones, Varga claims. However, the press release didn’t mention the rated power output (AC) of the system or the commercialization details.